0000000000997490

AUTHOR

Ivan Hadzaman

showing 2 related works from this author

Nanoporous characterization of modified humidity-sensitive MgO-Al 2 O 3 ceramics by positron annihilation lifetime spectroscopy method

2019

The work was supported by the Ukrainian Ministry of Education and Science. H. Klym thanks Prof. O. Shpotyuk for the fruitful discussion.

010302 applied physicsMaterials scienceNanoporousHumidity02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesCharacterization (materials science)Chemical engineeringvisual_art0103 physical sciencesvisual_art.visual_art_mediumCeramic0210 nano-technologySpectroscopyPositron annihilationIOP Conference Series: Materials Science and Engineering
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Positron annihilation characterization of free volume in microand macro-modified Cu0.4Co0.4Ni0.4Mn1.8O4ceramics

2016

Free volume and pore size distribution size in functional micro and macro-micro-modified Cu0.4Co0.4Ni0.4Mn1.8O4 ceramics are characterized by positron annihilation lifetime spectroscopy in comparison with Hg-porosimetry and scanning electron microscopy technique. Positron annihilation results are interpreted in terms of model implication positron trapping and ortho-positronium decaying. It is shown that free volume of positron traps are the same type for macro and micro modified Cu0.4Co0.4Ni0.4Mn1.8O4 ceramics. Classic Tao-Eldrup model in spherical approximation is used to calculation of the size of nanopores smaller than 2 nm using the ortho-positronium lifetime.

010302 applied physicsMaterials sciencePhysics and Astronomy (miscellaneous)Scanning electron microscopeGeneral Physics and Astronomy02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesMolecular physicsCharacterization (materials science)Nuclear physicsNanoporePositronVolume (thermodynamics)visual_art0103 physical sciencesvisual_art.visual_art_mediumCeramicPhysics::Chemical Physics0210 nano-technologyPorositySpectroscopy
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